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发明名称
Gravity meter
摘要
申请公布号
US2351955(A)
申请公布日期
1944.06.20
申请号
US19410377395
申请日期
1941.02.04
申请人
ANTON GRAF
发明人
GRAF ANTON
分类号
G01V7/04
主分类号
G01V7/04
代理机构
代理人
主权项
地址
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